class_docstr: The Ray Serve integration engine needs to have a working connection to Ray Serve. For this:
      - A Ray Serve server should be running
  
  Example:
      
code: def create_validation(target, args=None, **kwargs):
      if not args.get("using"):
          raise Exception(
              "Error: This engine requires some parameters via the 'using' clause. Please refer to the documentation of the Ray Serve handler and try again."
          )  # noqa
      if not args["using"].get("train_url"):
          raise Exception(
              "Error: Please provide a URL for the training endpoint."
          )
      if not args["using"].get("predict_url"):
          raise Exception(
              "Error: Please provide a URL for the prediction endpoint."
          )
  
file_path: mindsdb/mindsdb/integrations/handlers/ray_serve_handler/ray_serve_handler.py
imports: import requests
  from typing import Dict, Optional
  import pandas
  from mindsdb.integrations.libs.base import BaseMLEngine
label_desc: Use image node_id 1 for calling the RayServeHandler obj's underlying member method code with example usage: obj.create_validation(target, args) without return types